Enhancement of mechanical properties by the reinforcement of Fly ash in aluminium metal matrix composites

Abstract

There remains a large scope for new micro filler materials in metal matrix to be used as a composite for structural applications which enhance the mechanical properties of the material. Among the range of available materials for engineering applications metal matrix composites (MMCs) are important engineering materials. Amid the different random reinforcement techniques fly ash is known for its economic viability and near to the ground density factor. Hence composites reinforced with fly ash are an important class of materials. The dispersion characters of filler material are reviewed and studied. Aluminium 6063 alloy was used as the matrix for the fabrication of composites. MMCs were prepared by dispersing fly ash content of 5%, 10%, 15% and 20% by volume of metal matrix. Tensile testing of the samples was carried out. After comparing the composites with aluminium alloy increase in tensile strength of about 58% used for 15% fly ash content was observed. Similar results were obtained when hardness of 10% fly ash reinforced MMC was established 75% higher than parent aluminium alloy. There was also improvement in the wear resistance of the samples compared to its parent alloy. Scanning Electron Microscopy analysis (SEM) analysis was done to observe the dispersion of the fly ash content in aluminium (Al) matrix. Hence enhancement in mechanical properties was observed which are important for structural applications